Add-Backs Aren't Math, They're a Credibility Test.
Buyers are paid to be skeptical. In any M&A deal, the add-back schedule is the first place that skepticism meets the seller’s story.
We’re not talking about standard, non-cash items like depreciation or amortization. We’re talking about the owner’s “discretionary” expenses. This document is the first, and often most important, gut-check of the entire deal.
2025 “Credibility Gap”
The market environment of 2024-2025 is not the frothy market of 2021. With higher financing costs and a persistent gap between buyer and seller valuation expectations , “disciplined investor behaviors” are the new norm.
An S&P Global 2024 study of leveraged deals revealed that add-backs represent a significant portion of adjusted EBITDA, with a median of 30% and averages as high as 53% [1]. More importantly, the projections these add-backs support are consistently wrong. The same study found that companies miss their leverage projections by a median of 2.3 turns in the first year and 2.7 turns in the second year [1].
Buyers know this. This data is why M&A advisory firm PKF O’Connor Davies identified in a September 2025 report the “EBITDA Credibility Gap” [2]. Buyers are no longer willing to debate “excessive and subjective” adjustments with limited supporting evidence.
The tolerance for seller “stories” is at an all-time low. Buyers are actively looking for red flags to justify a lower price or to walk away.
Example: The Deal-Killing List
We were in diligence on a $20M services company. The CIM looked clean. Then the add-back schedule arrived. It included:
$75,000 for the owner’s G-Wagon.
$40,000 in “Travel & Entertainment” that were clearly personal family vacations.
$50,000 for a “wellness retreat”.
$60,000 for a family member on payroll who didn’t have a job title.
The seller’s banker tried to argue these were “non-recurring owner expenses.” We didn’t even bother to argue.
The Signal
The problem wasn’t the $225,000, it the list proved the owner had zero financial discipline.
This isn’t an “adjustment” but a signal. It tells us the owner runs the company like a personal piggy bank, not a professional system.
The seller failed the credibility test. Our diligence process immediately changed.
Our new assumption: If the owner is this sloppy and non-compliant with their P&L, they are almost certainly sloppy with their contracts, customer records, and regulatory compliance.
Trust evaporated. The seller didn’t just invite a painful diligence process; they invited an adversarial one. We assigned two extra associates to audit everything. The seller complained about the friction. The deal died from fatigue three weeks later.
Your Real Job
Aspiring finance professionals are taught to model add-backs. Real-world analysts are trained to interpret them.
Your job isn’t to be a calculator. It’s to be a filter. You must ask the right question. Is this add-back a legitimate one-time cost, or is it a symptom of a dysfunctional owner?
One is a simple math adjustment. The other is a fatal red flag. Don’t confuse the two.
Footnotes
[1] S&P Global (2024) EBITDA Addback Study
[2] PKF O’Connor Davies (2025) EBITDA Credibility Gap